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New alloy could split water to make fuel
Anonymous Kritter Show this Post
09-02-2011, 02:20 PM #1
Anonymous Kritter Incognito Anonymous
Quote:Kate Taylor
TG Daily

A team of Kentucky scientists has found a way to ‘tweak’ an inexpensive semiconductor to generate hydrogen from water using sunlight.

Through theoretical computations, they’ve demonstrated that an alloy formed by a two percent substitution of antimony in gallium nitride has the right electrical properties to enable solar light energy to split water molecules into hydrogen and oxygen, a process known as photoelectrochemical (PEC) water splitting.

When the alloy is immersed in water and exposed to sunlight, the chemical bond between the hydrogen and oxygen molecules in water is broken, allowing the hydrogen to be collected.

“Previous research on PEC has focused on complex materials. We decided to go against the conventional wisdom and start with some easy-to-produce materials, even if they lacked the right arrangement of electrons to meet PEC criteria,” says Professor Madhu Menon of the University of Kentucky.

“Our goal was to see if a minimal ‘tweaking’ of the electronic arrangement in these materials would accomplish the desired results.”

The GaN-Sb alloy is the first easy-to-produce candidate for PEC water splitting, claims the team. It functions as a catalyst in the PEC reaction, meaning it’s not consumed, and can be reused indefinitely.

Because pure hydrogen gas isn’t found widely in nature, it must be manufactured by unlocking it from other compounds. Currently, it takes a lot of electricity to generate hydrogen by water splitting, which is why most of the hydrogen manufactured today is derived from non-renewable sources such as coal and natural gas.

Sunkara says the GaN-Sb alloy has the potential to convert solar energy into an economical, carbon-free source for hydrogen.

“Hydrogen production now involves a large amount of CO2 emissions,” Sunkara said. “Once this alloy material is widely available, it could conceivably be used to make zero-emissions fuel for powering homes and cars and to heat homes.”

The researchers are now working to produce the alloy and test its ability to convert solar energy to hydrogen.
09-02-2011, 02:32 PM #2
Shadow Incognito Anonymous
Very cool hi5.gif but those scientists better not walk alone at night, or get in a hot tub or fly in a small plane or... lol.
09-02-2011, 02:35 PM #3
Kreeper Griobhtha
Posts:10,759 Threads:710 Joined:Feb 2011
Am I the only one that has a problem with using water for fuel? We only have a limited amount of fresh water on earth. We should NOT be using it for fuel. Maybe I just have not read enough about it. How far can you feasibly drive on a gallon of water? Can salt water be used in this process? What they need is a system of turning multiple sources in fuel. Solar, hydrogen, garbage, politicians, magnetic fields, etc. I think harnessing magnetic fields would be our best bet.

Remember all those conversations we had about TPTB controlling the food and WATER?

Maybe they know something we don't.


Politicians hide themselves away
They only started the war
Why should they go out to fight?
They leave that role to poor
09-02-2011, 02:45 PM #4
Shadow Incognito Anonymous
No you aren't the only one Kreeper.
09-02-2011, 02:54 PM #5
Kreeper Griobhtha
Posts:10,759 Threads:710 Joined:Feb 2011
(09-02-2011, 02:45 PM)Shadow Wrote:  No you aren't the only one Kreeper.


It really bothers me. All I drink is beer, a few cups of coffee in the morning and water.

Also, notice how they keep trying to go from one limited supply fuel source to another? Price control and increases. I know there are people working on other fuel sources such as garbage/leftover food, etc. It is rare to hear anything about them though. Like I said, I think trying to utilize the magnetic field is out best bet. Unlimited supply, unlimited power potential, no pollution and free. But that the problem, isn't it?


Politicians hide themselves away
They only started the war
Why should they go out to fight?
They leave that role to poor
09-02-2011, 02:56 PM #6
bohica Member
Posts:1,558 Threads:208 Joined:Feb 2011
Will removing the hydrogen then result in a super-oxygenated atmosphere ?
I think using politicians and other parasites would only contribute to pollution

I'm in my seventh decade on Earth. I know things.
09-02-2011, 03:05 PM #7
Kreeper Griobhtha
Posts:10,759 Threads:710 Joined:Feb 2011
That's a damn good question!

That's a damn good question I don't know the answer to.


I thought about that politician thing. On the one hand, we would have all that toxic , and possible radioactive, waste to deal with. On the other hand, we wouldn't have all those pork barrel politicians getting in the way of finding a solution. Without the politicians we could quit funding so much military and build rockets to send the waste into the sun...

Strike that...

The results could be bad. Very bad...

We could shoot the waste into deep space but the the Galactic Federation would form and strike out against us and the Zetas would be right again.


There must be SOMETHING we can do to get rid of politicians...


Politicians hide themselves away
They only started the war
Why should they go out to fight?
They leave that role to poor
09-02-2011, 04:15 PM #8
yankees skier
Posts:5,093 Threads:215 Joined:Feb 2011




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